rb_time_timeval    12 ext/-test-/wait_for_single_fd/wait_for_single_fd.c 	tv = rb_time_timeval(timeout);
rb_time_timeval   913 include/ruby/intern.h struct timeval rb_time_timeval(VALUE time);
rb_time_timeval  1405 internal.h     struct timeval rb_time_timeval(VALUE);
rb_time_timeval  1220 thread.c           rb_thread_wait_for(rb_time_timeval(INT2FIX(sec)));